Pub workspaces confusing message when sdk constriant does not match the installed Dart version

[orestesgaolin]

Environment

• Dart version 3.6.0 (build 3.6.0-239.0.dev)
• OS kind and version (e.g. "Windows 10, version 1809" or "macOS 12.4"): macOS

[✓] Flutter (Channel master, 3.26.0-1.0.pre.92, on macOS 14.5 23F79 darwin-arm64, locale pl-PL)
    • Flutter version 3.26.0-1.0.pre.92 on channel master at /Users/dominik/fvm/versions/master
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ea208f824b (3 hours ago), 2024-09-11 13:03:22 -0700
    • Engine revision ade8ef293b
    • Dart version 3.6.0 (build 3.6.0-239.0.dev)
    • DevTools version 2.39.0

Problem

I upgraded to current master and tried to use pub workspaces. However, because my packages would be set to use Dart SDK >= 3.3.0, a following error was shown when running flutter pub get

Error on line 9, column 13 of packages/analytics_repository/pubspec.yaml: `workspace` and `resolution` requires at least language version 3.5
  ╷
9 │ resolution: workspace
  │             ^^^^^^^^^
  ╵
Failed to update packages.

pubspec.yaml before change

name: analytics_repository
version: 0.0.1
publish_to: none

environment:
  sdk: ">=3.3.0 <4.0.0"
  flutter: ">=3.22.2"
resolution: workspace

required change

name: analytics_repository
version: 0.0.1
publish_to: none

environment:
  sdk: ">=3.5.0 <4.0.0"
  flutter: ">=3.22.2"
resolution: workspace

Expected behavior

I would expect a suggestion to change the Dart SDK constraint in the pubspec.yaml.

Actual behavior

as above